题解 | #返回每个顾客不同订单的总金额#
返回每个顾客不同订单的总金额
http://www.nowcoder.com/practice/ce313253a81c4947b20e801cd4da7894
使用右连接，以Orders表为基准
select cust_id,sum(item_price*quantity)as total_ordered
from OrderItems a
right join Orders b on a.order_num=b.order_num
group by cust_id
order by total_ordered desc;
